"Muskie Mark" Saemisch, fishing guide, teaches proper casting technique to Mark Vehlewald early on Aug. 3 2023 during a muskellunge, musky for short, fishing adventure in southern Wisconsin. (NWA Democrat-Gazette/Flip Putthoff) CASTLE ROCK LAKE, Wisc. -- Freshwater fish with teeth that swim in Ozark waters include walleye and brown trout. Those pale in size to the mighty muskellunge, a lean, mean fighting machine of northern waters. Already a subscriber? Log in!